[0001] The present disclosure relates generally to cargo management systems.
[0002] Conventional aircraft cargo systems typically include various tracks and rollers
that span the length of an aircraft. Power drive units ("PDUs") convey cargo forward
and aft along the aircraft on conveyance rollers which are attached to the aircraft
floor structure. Cargo may be loaded from an aft position on an aircraft and conducted
by the cargo system to a forward position and/or, depending upon aircraft configuration,
cargo may be loaded from a forward position on an aircraft and conducted by the cargo
system to an aft position. Conventional systems are typically designed to accommodate
a particular pallet size. Conventional systems are typically comprised of numerous
components that may be time consuming to install, replace and maintain.
[0003] The following features and elements may be combined in various combinations without
exclusivity, unless expressly indicated otherwise. These features and elements as
well as the operation thereof will become more apparent in light of the following
description and the accompanying drawings. It should be understood, however, the following
description and drawings are intended to be exemplary in nature and non-limiting.
[0004] Exemplary embodiments of the invention include a cargo management system having a
slide bushing supported cargo shuttle. The slide bushing supported cargo shuttle includes
an aft bushing slide plate and a forward bushing slide plate. The slide bushing supported
cargo shuttle also includes an aft wedge positioned between the top surface and the
aft bushing slide plate. The slide bushing supported cargo shuttle also includes a
forward wedge positioned between the top surface and the forward bushing slide plate.
The slide bushing supported cargo shuttle also includes a top surface configured to
be displaced upward as a first force is applied to the aft wedge and a second force
is applied to the forward wedge. The cargo management system also includes an aft
shuttle drive belt coupled to the slide bushing supported cargo shuttle and a forward
shuttle drive belt coupled to the slide bushing supported cargo shuttle.
[0005] Exemplary embodiments of the invention further include a cargo management system
comprising a slide bushing supported cargo shuttle having: an aft wedge, a forward
wedge, and a top surface positioned above the aft wedge and the forward wedge and
configured to be displaced upward in response to a first force applied to the aft
wedge and a second force applied to the forward wedge; an aft shuttle drive belt coupled
to the slide bushing supported cargo shuttle; and a forward shuttle drive belt coupled
to the slide bushing supported cargo shuttle.
[0006] Exemplary embodiments of the invention further include a slide bushing supported
cargo shuttle. The slide bushing supported cargo shuttle includes an aft bushing slide
plate, a forward bushing slide plate and a top surface that is adapted to be displaced
upward. The slide bushing supported cargo shuttle also includes an aft wedge positioned
between the aft bushing slide plate and the top surface. The aft wedge is coupled
to an aft shuttle drive belt that is adapted to apply an aft-ward force to the aft
wedge. The slide bushing supported cargo shuttle also includes a forward wedge positioned
between the forward bushing slide plate and the top surface. The forward wedge is
coupled to a forward shuttle drive belt that is adapted to apply forward force to
the forward wedge. The slide bushing supported cargo shuttle also includes an aft
spring and damper assembly that is adapted to apply a forward threshold force to the
aft wedge. The slide bushing supported cargo shuttle also includes a forward spring
and damper assembly that is adapted to apply an aft-ward threshold force to the forward
wedge.
[0007] Particular embodiments of the invention may include any of the following features,
alone or in combination.
[0008] The top surface may be positioned above the aft wedge and the forward wedge and may
be configured to be displaced upward in response to a first force applied to the aft
wedge and a second force applied to the forward wedge.
[0009] The slide bushing supported cargo shuttle may include an aft translating lift beam
coupled to the aft wedge; a forward translating lift beam coupled to the forward wedge;
an aft shuttle draw bar coupled to the aft translating lift beam and the aft shuttle
drive belt; and a forward shuttle draw bar coupled to the forward translating lift
beam and the forward shuttle drive belt.
[0010] The aft wedge may include 4 aft wedges and the forward wedge may include 4 forward
wedges.
[0011] The top surface may be configured to be displaced less than 6.35mm.
[0012] The aft shuttle drive belt may be configured to apply aft-ward force to the slide
bushing supported cargo shuttle.
[0013] The forward shuttle drive belt may be configured to apply forward force to the slide
bushing supported cargo shuttle.
[0014] The slide bushing supported cargo shuttle may be adapted to move aft-ward in response
to more aft-ward force being applied to the slide bushing supported cargo shuttle
than the forward force being applied to the slide bushing supported cargo shuttle.
[0015] The slide bushing supported cargo shuttle may be adapted to move forward in response
to more forward force being applied to the slide bushing supported cargo shuttle than
the aft-ward force being applied to the slide bushing supported cargo shuttle.
[0016] The slide bushing supported cargo shuttle may include an aft bushing slide plate
positioned beneath the aft wedge and a forward bushing slide plate positioned above
the wedge.
[0017] The top surface may be configured to be displaced upward in response to the aft wedge
being moved aft-ward between the top surface and the aft bushing slide plate and the
forward wedge being moved forward between the top surface and the forward bushing
slide plate.
[0018] A first aft bushing may be positioned between the aft bushing slide plate and the
aft wedge.
[0019] A second aft bushing may be positioned between the top surface and the aft wedge.
[0020] A first forward bushing may be positioned between the forward bushing slide plate
and the forward wedge.
[0021] A second forward bushing may be positioned between the top surface and the forward
wedge.
[0022] The cargo management system may comprise a floor panel having a plurality of bushings.
[0023] The plurality of bushings may be self-lubricating polymer bushings.
[0024] The slide bushing supported cargo shuttle may be adapted to move forward or aft-ward
over the plurality of bushings.
[0025] The cargo management system may further comprise an aft shuttle drive unit coupled
to the aft shuttle drive belt and configured to apply aft-ward force to the aft shuttle
drive belt; and a forward shuttle drive unit coupled to the forward shuttle drive
belt and configured to apply forward force to the forward shuttle drive belt.
[0026] The cargo management system may further comprise support beams configured to receive
cargo, wherein in response to the slide bushing supported cargo shuttle being positioned
beneath the cargo and the top surface being displaced upward, the top surface lifts
the cargo from the support beams.
[0027] The cargo management system may further comprise an aft spring and damper assembly
that is configured to apply forward force to the aft wedge; and a forward spring and
damper assembly that is configured to apply aft-ward force to the forward wedge.
[0028] The aft wedge may be positioned between the aft bushing slide plate and the top surface.
[0029] The aft wedge may be coupled to an aft shuttle drive belt that is adapted to apply
an aft-ward force to the aft wedge.
[0030] The forward wedge may be positioned between the forward bushing slide plate and the
top surface.
[0031] The forward wedge may be coupled to a forward shuttle drive belt that is adapted
to apply forward force to the at least one forward wedge.
[0032] The top surface may be adapted to be displaced upward in response to the aft shuttle
drive belt applying more aft-ward force than the forward threshold force and the forward
shuttle drive belt applying more forward force than the aft-ward threshold force.
[0033] The subject matter of the present disclosure is particularly pointed out and distinctly
claimed in the concluding portion of the specification. A more complete understanding
of the present disclosure, however, may best be obtained by referring to the detailed
description and claims when considered in connection with the drawing figures.
FIG. 1 illustrates a portion of a cargo management system, in accordance with various
embodiments;
FIG. 2 illustrates a portion of a cargo management system, in accordance with various
embodiments;
FIG. 3 illustrates a slide bushing supported cargo shuttle without a top surface,
in accordance with various embodiments;
FIG. 4 illustrates a cross-sectional view of a slide bushing supported cargo shuttle,
in accordance with various embodiments;
FIG. 5 illustrates a cross-sectional view of a portion of a slide bushing supported
cargo shuttle with a disengaged wedge, in accordance with various embodiments; and
FIG. 6 illustrates a cross-sectional view of a portion of a slide bushing supported
cargo shuttle with an engaged wedge, in accordance with various embodiments.
[0034] The detailed description of various embodiments herein makes reference to the accompanying
drawings, which show various embodiments by way of illustration. While these various
embodiments are described in sufficient detail to enable those skilled in the art
to practice the disclosure, it should be understood that other embodiments may be
realized and that logical, chemical, and mechanical changes may be made without departing
from the spirit and scope of the disclosure. Thus, the detailed description herein
is presented for purposes of illustration only and not of limitation. For example,
the steps recited in any of the method or process descriptions may be executed in
any order and are not necessarily limited to the order presented. Furthermore, any
reference to singular includes plural embodiments, and any reference to more than
one component or step may include a singular embodiment or step. Also, any reference
to attached, fixed, connected, or the like may include permanent, removable, temporary,
partial, full, and/or any other possible attachment option.
[0035] As used herein, "aft" refers to the direction associated with the tail of an aircraft,
or generally, to the direction of exhaust of the gas turbine. As used herein, "forward"
refers to the direction associated with the nose of an aircraft, or generally, to
the direction of flight or motion.
[0036] Aircraft cargo management systems as disclosed herein allow cargo to be loaded into
an aircraft and positioned within the aircraft in a simple, elegant manner. In that
regard, aircraft cargo management systems as disclosed herein may reduce part count
and associated replacement/wear costs over time.
[0037] With reference to FIGs. 1 and 2 an aircraft cargo management system is illustrated
using an x, y, and z axes for ease of illustration. Slide bushing supported cargo
shuttle 100 and 200 are shown forward of an aft portion of an aircraft. Slide bushing
supported cargo shuttle 100 is coupled to aft shuttle drive belt 104A and slide bushing
supported cargo shuttle 200 is coupled to aft shuttle drive belt 104B. Aft shuttle
drive belt 104A is coupled to aft shuttle drive unit 204A. Aft shuttle drive belt
104B is coupled to aft shuttle drive unit 204B. Floor panel 108 is shown beneath slide
bushing supported cargo shuttle 100 and 200. As used with respect to slide bushing
supported cargo shuttle 100 and 200, the term "beneath" may refer to a location of
a first point further in the negative z direction relative to a second point. Support
rails 112 are shown laterally adjacent to floor panel 108. Support rails 112 may be
mounted to another aircraft component, such as an airframe, and may be capable of
supporting the weight of cargo. Floor panel 108 may comprise a composite material
and/or a metallic material. In various embodiments, floor panel 108 may not be included
in the aircraft.
[0038] Slide bushing supported cargo shuttle 100 is coupled to forward shuttle drive belt
102A and slide bushing supported cargo shuttle 200 is coupled to forward shuttle drive
belt 102B. Forward shuttle drive belt 102A is coupled to forward shuttle drive unit
202A. Forward shuttle drive belt 102B is coupled to forward shuttle drive unit 202B.
Cargo 206A and cargo 206B are shown as resting on support rails 112. Two or more support
rails 112 may exist for supporting each container of cargo 206. Slide bushing supported
cargo shuttle 200 may be used to lift cargo 206A (e.g., in the positive z direction)
off support rails 112 and move cargo 206A forward or aft.
[0039] Forward shuttle drive belt 102A, forward shuttle drive belt 102B, aft shuttle drive
belt 104A, and aft shuttle drive belt 104B (collectively, a "shuttle belt") may comprise
any suitable belt capable of pulling an air cushion slide bushing supported cargo
shuttle. For example, a shuttle belt may comprise a flat belt, a rope, a cable, a
nylon belt, a linked chain, a pin and roller chain or the like. In that regard, a
flat shuttle belt may not occupy excess space along the z direction. For example,
a shuttle belt may comprise a #polyurethane coated belt #that includes a communications
and power bus. In that regard, the structural support and power/data functions are
provided by a single shuttle belt structure. For example, in various embodiments,
a shuttle belt may comprise steel wires oriented in parallel and coated with polyurethane
to hold the steel wires together, provide anti-friction properties, and noise dampening
properties. Among the steel wires may be copper wires or other wires that are capable
of carrying an electrical current at any suitable voltage. In that regard, the shuttle
belt may comprise one or more copper wires to carry high voltage power and/or low
voltage electrical signals that may convey data.
[0040] The shuttle belts may be wound around a portion of forward shuttle drive unit 202A,
forward shuttle drive unit 202B, aft shuttle drive unit 204A and aft shuttle drive
unit 204B (collectively, "shuttle drive unit"). In that regard, a shuttle drive unit
may comprise a cylindrical structure (e.g., a bobbin) to which a shuttle belt is affixed.
The shuttle drive unit comprises a motive device, such as an electric motor, to rotate
the bobbin in a desired direction. The shuttle drive unit may also disengage the electric
motor or be otherwise geared in such a manner so that free rotation of the bobbin
is allowed.
[0041] FIG. 3 illustrates slide bushing supported cargo shuttle 100 without top surface
106 attached. Aft shuttle drive belt 104A is attached to aft shuttle drawbar 300.
Aft shuttle drawbar 300 is attached to aft translating lift beam 304. Aft shuttle
drawbar 300 is a bar that transfers force from aft shuttle drive belt 104A to aft
translating lift beam 304. When tension is applied to aft shuttle drive belt 104A,
aft shuttle drawbar 300 and aft translating lift beam 304 are moved in the aft (negative
X) direction.
[0042] Aft translating lift beam 304 is attached to aft wedge 312A, 312B, 312C and 312D.
Aft translating lift beam 304 is a beam that transfers force from aft shuttle drawbar
300 to each aft wedge 312A, 312B, 312C and 312D. Aft wedges 312 have aft bushings
308 positioned between aft wedges 312 and top surface 106. Aft bushings 308 allow
aft wedges 312 to move between an engaged position (aft, the negative X direction)
and a disengaged position (forward, the positive X direction) underneath top surface
106. Aft bushings 308 may be any type of bushing, such as fiber reinforced, self-lubricating
polymer bushings. When engaged, aft wedges 312 lift top surface 106 in the positive
Z direction, such that cargo 206A is raised above support rails 112. When disengaged,
top surface 106 is positioned low enough on the Z axis for cargo 206A to rest on support
rails 112.
[0043] Aft return springs and dampers 316 are positioned such that they apply force to aft
translating lift beam 304 and aft wedges 312 in the positive X direction. When aft
shuttle drive belt 104A is not in tension (or the tension is below a threshold tension
level), return springs and dampers 316 will cause aft wedges 312 to be in a disengaged
position. Therefore, top surfaces 106 of slide bushing supported cargo shuttle 100
will not lift unless an overcoming force is applied by aft shuttle drive belt 104A.
When overcoming force is applied by aft shuttle drive belt 104A, aft wedges 312 are
forced in the negative X direction, which in turn forces top surface 106 in the positive
Z direction. This in turn raises cargo 206A from support rails 112 such that slide
bushing supported cargo shuttle 100 can be moved forward or aft over bushings 110.
[0044] Forward shuttle drive belt 102A is attached to forward shuttle drawbar 302. Forward
shuttle drawbar 302 is attached to forward translating lift beam 306. When sufficient
tension is applied in the forward direction (positive X direction) to forward shuttle
drive belt 102A, forward translating lift beam 306 is moved in the forward direction.
Forward translating lift beam 306 is attached to forward wedges 314, which are positioned
underneath top surface 106. Forward bushings 310 are positioned between forward wedges
314 and top surface 106 in order to allow forward wedges 314 to freely move forward
and aft underneath top surface 106. In response to forward translating lift beam 306
moving forward, forward wedges 314 are engaged (moved in the positive X direction)
underneath top surface 106, thus forcing top surface 106 upward (positive Z direction).
When the threshold tension is not applied to forward shuttle drive belt 102A, forward
wedges 314 are disengaged (positioned in the negative X direction from the engaged
position).
[0045] Forward return springs and dampers 318 are positioned in such a way as to force forward
translating lift beam 306 and forward wedges 314 in the negative X direction. This
force ensures that without threshold force being applied to forward wedges 314 in
the positive X direction, forward wedges 314 remain disengaged. This movement prevents
top surface 106 from moving in the positive Z direction unless an overcoming force
is applied by forward shuttle drive belt 102A.
[0046] Returning now to FIGs. 1 and 2, Cargo 206A rests on top surface 106 of slide bushing
supported cargo shuttle 100. Slide bushing supported cargo shuttle 100 may raise cargo
206A from support rails 112 (i.e., move in the positive Z direction) by applying tension
to both aft shuttle drive belt 104A and forward shuttle drive belt 102A. Applying
this tension causes top surface 106 of slide bushing supported cargo shuttle 100 to
raise from floor panel 108 (or support rails 112). Tension may be applied to aft shuttle
drive belt 104A by rotating the bobbin on aft shuttle drive unit 204A. Tension may
be applied to forward shuttle drive belt 102A by rotating the bobbin on forward shuttle
drive unit 202A. Slide bushing supported cargo shuttle 200 may provide lift cargo
206A in the same manner.
[0047] In order to move slide bushing supported cargo shuttle 100 forward, more force may
be applied to forward shuttle drive belt 102A than aft shuttle drive belt 104A. To
move slide bushing supported cargo shuttle 100 aft, more force may be applied to aft
shuttle drive belt 104A than forward shuttle drive belt 102A. Slide bushing supported
cargo shuttle 200 may move forward and aft in the same manner.
[0048] In order to unload cargo 206A from slide bushing supported cargo shuttle, tension
may be released from aft shuttle drive belt 104A and forward shuttle drive belt 102A.
This lack of tension will cause top surface 106 to move in the negative Z direction
back towards floor panel 108 (or support rails 112). Cargo 206A will rest on support
rails 112 in response to tension release from aft shuttle drive belt 104A and forward
shuttle drive belt 102A. Slide bushing supported cargo shuttle 100 may then be moved
forward or aft by applying tension to forward shuttle drive belt 102A or aft shuttle
drive belt 104A.
[0049] Slide bushing supported cargo shuttle 100 and 200 may glide over bushings 110 when
moving forward or aft. Bushings 110 may be plastic-based bushings. For example, bushings
110 may be fiber reinforced polymer self-lubricating bushings such as an internally
lubricated, acetal-based material such as that sold under the trademark Turcite® T47
#which is available from Trellebord Sealing Solutions, Fort Wayne, Indiana#. When
slide bushing supported cargo shuttle 100 and/or 200 is providing lift to cargo 206A
such that cargo 206A is lifted from support rails 112, or when no cargo is positioned
on slide bushing supported cargo shuttle 100 and/or 200, slide bushing supported cargo
shuttle 100 and/or 200 may move forward or aft, depending on tension applied to aft
shuttle drive belt 104A and/or forward shuttle drive belt 102A. When moving forward
or aft in a lifted or cargo-less state, slide bushing supported cargo shuttle 100
may glide over bushings 110 without or with few other friction contact points counteracting
the movement of slide bushing supported cargo shuttle 100 and/or 200.
[0050] FIG. 4 illustrates a cross-sectional view of slide bushing supported cargo shuttle
100. The cross section illustrated in FIG. 4 includes top surface 106 and illustrates
how wedges 312 and 314 provide lift to top surface 106. As illustrated, aft translating
lift beam 304 is attached to aft wedge 312C. Aft wedge 312C narrows from the forward
direction to the aft-ward direction. Aft wedge 312C is positioned between top surface
and aft bushing slide plate 400. Aft bushing slide plate 400 may be positioned on
bushings 110. Aft bushing slide plate 400 may be adapted to move in the forward and
aft direction over bushings 110. In various embodiments, aft bushing slide plate 400
may have a top surface that is friction resistant, so that aft wedge 312C can easily
move between an engaged and disengaged position between top surface 106 and aft bushing
slide plate 400.
[0051] Not illustrated but extending in the aft (negative X) direction is aft shuttle drive
belt 104A. When aft shuttle drive belt 104A is in sufficient tension to overcome the
force exerted by return springs and dampers 316, aft wedge 312C becomes engaged (is
moved in the aft direction). When aft wedge 312C is engaged, aft wedge 312C is forced
between top surface 106 and aft bushing slide plate 400. Because aft wedge 312C narrows
from the forward direction to the aft-ward direction, when it moves aft-ward between
top surface 106 and aft bushing slide plate 400 it forces top surface 106 apart from
aft bushing slide plate 400. Because aft bushing slide plate 400 is positioned adjacent
floor panel, when top surface 106 and aft bushing slide plate 400 are forced apart,
aft bushing slide plate 400 is restrained from downward motion (motion in the negative
Z direction). Therefore, top surface 106 moves upward.
[0052] Forward translating lift beam 306 is attached to forward wedge 314C. When force is
applied to forward shuttle drive belt 102A in the forward direction, forward wedge
314C moves in the forward direction and separates top surface 106 from forward bushing
slide plate 412, raising top surface 106 upward, in the same manner that aft wedge
312C forces top surface 106 upward.
[0053] When aft shuttle drive belt 104A and forward shuttle drive belt 102A are exerting
enough force to overcome aft return springs and dampers 316 and forward return springs
and dampers 318, wedges 312 and 314 force top surface 106 apart from aft bushing slide
plate 400 and forward bushing slide plate 402. Because aft bushing slide plate 400
and forward bushing slide plate 402 are positioned above and adjacent to floor panel
108, aft bushing slide plate 400 and forward bushing slide plate 402 are restrained
from downward motion (in negative z direction). Therefore, top surface 106 moves upward.
[0054] Wedges 312C and 314C are adapted to raise top surface 106 and cargo 206A above support
rails 112. When cargo 206A is lifted from support rails 112 in this fashion, more
force can be applied to aft shuttle drive belt 104A than forward shuttle drive belt
102A, or forward shuttle drive belt 102A than aft shuttle drive belt 104A, in order
to move slide bushing supported cargo shuttle 100 in the aft or forward direction.
When slide bushing supported cargo shuttle 100 is moving aft or forward, aft bushing
slide plate 400 and forward bushing slide plate 402 glide over bushings 110 positioned
throughout floor panel 108. Bushings 110 may be supported by beams in various embodiments.
[0055] FIG. 5 illustrates a cross-sectional view of portion 408 (as illustrated in FIG.
4) of slide bushing supported cargo shuttle 100. FIG. 5 illustrates slide bushing
supported cargo shuttle 100 with aft wedge 312C disengaged such that top surface 106
not raised. As illustrated, aft translating lift beam 304 is attached to aft wedge
312C. Between aft wedge 312C and top surface 106 is aft bushing 308C. Between aft
wedge 312C and aft bushing slide plate 400 is another bushing 500. Bushings 308C and
500 allow wedge 312C to move in the aft and forward direction between top surface
106 and aft bushing slide plate 400.
[0056] A gap 501 exists between top surface 106 and aft bushing slide plate 400 aft of aft
wedge 312C. Gap 501 has a distance 410. When aft wedge 312C is engaged, it is moved
into gap 501, displacing top surface 106 in an upward direction (positive z direction).
[0057] In various embodiments, top surface 106 may be displaced upward a quarter of an inch
(6.35mm) or less. Because cargo bays are designed to maximize space, room above cargo
206A may be limited. Therefore, the cargo system may be designed such that top surface
106 may only need to be displaced a distance of a quarter of an inch (6.35mm) or less
to lift cargo 206A from support rails 112.
[0058] FIG. 6 illustrates a cross-sectional view of portion 408 (as illustrated in FIG.
4) of slide bushing supported cargo shuttle 100 with aft wedge 312C engaged. In FIG.
6, top surface 106 is displaced in an upward direction (positive z direction) from
aft bushing slide plate 400. In FIG. 6, aft wedge 312C is positioned farther aft than
in FIG. 5. As aft wedge 312C is positioned farther aft, gap 501 has a smaller distance
504 than distance 410. Aft wedge 312C forces aft bushing slide plate 400 and top surface
106 apart. This causes top surface 106 to be raised a distance 502 from aft bushing
slide plate 400 (and accordingly, lifted a distance 502 from floor panel 108 or support
rails 112). In response to top surface 106 being lifted from floor panel 108, cargo
206A is lifted from support rails 112. This allows slide bushing supported cargo shuttle
100, with cargo 206A, to be maneuvered forward or aft on floor panel 108 without friction
or with little friction between cargo 206A and support rails 112.
[0059] In FIG. 6, aft shuttle drive belt 104A has been engaged (causing an aft-ward force
above the threshold of aft return springs and dampers 316) causing aft translating
lift beam 304 to move in the aft direction. Because aft wedge 312C is attached to
aft translating wedge lift beam, aft wedge 312C is also moved aft into gap 501, causing
top surface 106 to become displaced from floor panel 108.
[0060] In response to the force applied by aft shuttle drive belt 104A becoming less than
the threshold force of aft return springs and dampers 316, aft return springs and
dampers 316 cause aft wedge 312C to return to the position illustrated in FIG. 5.
This causes top surface 106 to be lowered back down towards floor panel 108. In response
to this, cargo 206A may rest on support rails 112, and slide bushing supported cargo
shuttle 100 can be moved forward or aft away from cargo 206A.
[0061] Benefits, other advantages, and solutions to problems have been described herein
with regard to specific embodiments. Furthermore, the connecting lines shown in the
various figures contained herein are intended to represent exemplary functional relationships
and/or physical couplings between the various elements. It should be noted that many
alternative or additional functional relationships or physical connections may be
present in a practical system. However, the benefits, advantages, solutions to problems,
and any elements that may cause any benefit, advantage, or solution to occur or become
more pronounced are not to be construed as critical, required, or essential features
or elements of the disclosure. The scope of the disclosure is accordingly to be limited
by nothing other than the appended claims, in which reference to an element in the
singular is not intended to mean "one and only one" unless explicitly so stated, but
rather "one or more." Moreover, where a phrase similar to "at least one of A, B, or
C" is used in the claims, it is intended that the phrase be interpreted to mean that
A alone may be present in an embodiment, B alone may be present in an embodiment,
C alone may be present in an embodiment, or that any combination of the elements A,
B and C may be present in a single embodiment; for example, A and B, A and C, B and
C, or A and B and C. Different cross-hatching is used throughout the figures to denote
different parts but not necessarily to denote the same or different materials.
[0062] Systems, methods and apparatus are provided herein. In the detailed description herein,
references to "one embodiment", "an embodiment", "various embodiments", etc., indicate
that the embodiment described may include a particular feature, structure, or characteristic,
but every embodiment may not necessarily include the particular feature, structure,
or characteristic. Moreover, such phrases are not necessarily referring to the same
embodiment. Further, when a particular feature, structure, or characteristic is described
in connection with an embodiment, it is submitted that it is within the knowledge
of one skilled in the art to affect such feature, structure, or characteristic in
connection with other embodiments whether or not explicitly described. After reading
the description, it will be apparent to one skilled in the relevant art(s) how to
implement the disclosure in alternative embodiments.
[0063] Furthermore, no element, component, or method step in the present disclosure is intended
to be dedicated to the public regardless of whether the element, component, or method
step is explicitly recited in the claims. No claim element herein is to be construed
under the provisions of 35 U.S.C. 112(f) unless the element is expressly recited using
the phrase "means for." As used herein, the terms "comprises", "comprising", or any
other variation thereof, are intended to cover a non-exclusive inclusion, such that
a process, method, article, or apparatus that comprises a list of elements does not
include only those elements but may include other elements not expressly listed or
inherent to such process, method, article, or apparatus.
1. A cargo management system comprising:
a slide bushing supported cargo shuttle having:
an aft wedge,
a forward wedge, and
a top surface positioned above the aft wedge and the forward wedge and configured
to be displaced upward in response to a first force applied to the aft wedge and a
second force applied to the forward wedge;
an aft shuttle drive belt coupled to the slide bushing supported cargo shuttle; and
a forward shuttle drive belt coupled to the slide bushing supported cargo shuttle.
2. The cargo management system of claim 1, wherein the slide bushing supported cargo
shuttle includes:
an aft translating lift beam coupled to the aft wedge;
a forward translating lift beam coupled to the forward wedge;
an aft shuttle draw bar coupled to the aft translating lift beam and the aft shuttle
drive belt; and
a forward shuttle draw bar coupled to the forward translating lift beam and the forward
shuttle drive belt.
3. The cargo management system of claim 1 or 2, wherein the aft wedge includes 4 aft
wedges and the forward wedge includes 4 forward wedges.
4. The cargo management system of any of the preceding claims, wherein the top surface
is configured to be displaced less than 6.35mm.
5. The cargo management system of any of the preceding claims, wherein:
the aft shuttle drive belt is configured to apply aft-ward force to the slide bushing
supported cargo shuttle;
the forward shuttle drive belt is configured to apply forward force to the slide bushing
supported cargo shuttle;
the slide bushing supported cargo shuttle is adapted to move aft-ward in response
to more aft-ward force being applied to the slide bushing supported cargo shuttle
than the forward force being applied to the slide bushing supported cargo shuttle;
and
the slide bushing supported cargo shuttle is adapted to move forward in response to
more forward force being applied to the slide bushing supported cargo shuttle than
the aft-ward force being applied to the slide bushing supported cargo shuttle.
6. The cargo management system of any of the preceding claims, wherein:
the slide bushing supported cargo shuttle includes an aft bushing slide plate positioned
beneath the aft wedge and a forward bushing slide plate positioned above the wedge;
and
the top surface is configured to be displaced upward in response to the aft wedge
being moved aft-ward between the top surface and the aft bushing slide plate and the
forward wedge being moved forward between the top surface and the forward bushing
slide plate.
7. The cargo management system of claim 6, wherein:
a first aft bushing is positioned between the aft bushing slide plate and the aft
wedge;
a second aft bushing is positioned between the top surface and the aft wedge;
a first forward bushing is positioned between the forward bushing slide plate and
the forward wedge; and
a second forward bushing is positioned between the top surface and the forward wedge.
8. The cargo management system of any of the preceding claims, further comprising a floor
panel having a plurality of bushings.
9. The cargo management system of claim 8, wherein the plurality of bushings are self-lubricating
polymer bushings.
10. The cargo management system of claim 8 or 9, wherein the slide bushing supported cargo
shuttle is adapted to move forward or aft-ward over the plurality of bushings.
11. The cargo management system of any of the preceding claims, further comprising:
an aft shuttle drive unit coupled to the aft shuttle drive belt and configured to
apply aft-ward force to the aft shuttle drive belt; and
a forward shuttle drive unit coupled to the forward shuttle drive belt and configured
to apply forward force to the forward shuttle drive belt.
12. The cargo management system of any of the preceding claims, further comprising support
beams configured to receive cargo, wherein in response to the slide bushing supported
cargo shuttle being positioned beneath the cargo and the top surface being displaced
upward, the top surface lifts the cargo from the support beams.
13. The cargo management system of any of the preceding claims, further comprising:
an aft spring and damper assembly that is configured to apply forward force to the
aft wedge; and
a forward spring and damper assembly that is configured to apply aft-ward force to
the forward wedge.
14. A slide bushing supported cargo shuttle comprising:
an aft bushing slide plate;
a forward bushing slide plate;
a top surface adapted to be displaced upward;
an aft wedge positioned between the aft bushing slide plate and the top surface and
coupled to an aft shuttle drive belt that is adapted to apply an aft-ward force to
the aft wedge;
a forward wedge positioned between the forward bushing slide plate and the top surface
and coupled to a forward shuttle drive belt that is adapted to apply forward force
to the at least one forward wedge;
an aft spring and damper assembly adapted to apply a forward threshold force to the
aft wedge; and
a forward spring and damper assembly adapted to apply an aft-ward threshold force
to the forward wedge.
15. The slide bushing supported cargo shuttle of claim 14, wherein the top surface is
adapted to be displaced upward in response to the aft shuttle drive belt applying
more aft-ward force than the forward threshold force and the forward shuttle drive
belt applying more forward force than the aft-ward threshold force.